What is Through Conduit Knife Gate Valve ?
The through conduit knife gate valve is also called the knife gate valve with diversion hole. Its gate is always in close contact with the valve seat and sealed. Its gate is the same as the flat gate valve with diversion hole. There is a circular hole of the same diameter on the gate. The circular hole on the gate is completely separated and matched with the diameter by opening and closing the gate.
Advantages of through conduit knife gate valve
- 01The valve adopts an integral design, with small fluid resistance and flexible and convenient operation.
- 02The screw drive of the penetrating knife gate valve adopts a double-plane bearing design, which greatly reduces the transmission friction, so that the valve can be opened easily and smoothly.
- 03The sealing seat of the knife gate valve adopts a movable seal, and the O-ring pre-tightening is used to provide pre-tightening force to make the sealing seat close to the valve disc, which greatly reduces the leakage. It has an automatic compensation function for the wear of the sealing pair in long-term use, which increases the service life.
- 04The fixed guide claw and the groove-free design are not easy to cause medium accumulation or jamming.
- 05The valve seat can choose metal hard seal or soft seal according to the needs of the medium and working conditions: the gate plate adopts surface chrome plating or ion nitriding treatment to make the gate plate more wear-resistant and the sealing surface longer in service life; the soft seal can be selected from PTFE valve seat or enhanced PTFE valve seat or EPDM, NBR rubber, with good sealing and corrosion resistance.
- 06Good sealing performance and strong economic practicality, the operation can be manual, pneumatic, and electric, and the practical range is very wide.
Design Standard
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| The characteristics of through conduit knife gate valve |
The valve body has no grooves, the medium will not be blocked, and it has full-diameter flow characteristics, which is suitable for use in pipelines with powder and granular media. Its sealing structure can be divided into soft seal and hard seal structure. The sealing valve seat is designed as a movable structure, with anti-wear and automatic compensation functions, so it has a longer life. During the closing and opening process, the valve seat and the gate plate always move closely, making the valve opening and closing force stable, and it has the characteristics of cutting off the medium. The valve body cavity, valve seat configuration and inclined gate design provide the function of blocking the entry of thick media (such as pulp, slurry) or solid media (such as particles and powders). The gate of the through conduit knife gate valve is always in close contact with the valve seat. The gate is the same as the flat gate valve with a diversion hole. There is a round hole of the same diameter on the gate. The gate is opened and closed to make the round hole on the gate plate completely separate and match the diameter. |
| Technical Parameters | |
| Size | DN15-DN1500, 1/2''-60'' |
| Pressure | PN10-PN420, Class150-Class2500 |
| Temperature | -200°C to 650°C |
| Connection Type | Flange, Thread, Wafer, Welded |
| Operation Mode | Manual, Pneumatic, Electric, Hydraulic, Gear operation |
| Materials | ||
| Valve Body | Forged | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, etc |
| Cast | WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc. | |
| Valve Stem | F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500, N08020, Inconel625, Incoloy825, etc. | |
| Valve Disc | A105, LF2, F5, F9, F11, F22, F304, F316, F347, F904, F51, F53, F310, N08020, Inconel625, F6a, 17-4PH, XM-19, F304, F316, F347, F904, F51, F53, F310, Monel400, Monel500，Incoloy825，WCB, LCB, C5, C12, WC6, WC9, CF8, CF8M, CF8C, 4A, 5A, CN7M, C95800, CW6MC, etc. | |
| Seat Sealing | SS, BR, CU, AS, CS, AL, PTFE, NBR, FKM, AI203, etc. | |
| Design Standards | |
| Valve Body | API 6D, API 608, ASME B16.34, DIN 3357, BS 5351, GOST 9833, JIS B2071, GB/T 12237, etc. |
| Flange | ANSI B16.5, EN 1092-1, JIS B2220, GB/T 9113, ASME B16.47, GOST 12821, DIN 2543-2545, etc. |
| Connection | ANSI B16.10, ASME B16.25, JIS B2212, GOST 33259, DIN 3202, etc. |
| Test Standards | API 598, ISO 5208, BS EN 12266, ASME B16.104, GOST 9544-2015, JIS B2003, DIN 3230, etc. |
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